NetAlly EtherScope nXG vs tcpdump

NetAlly EtherScope nXG has no write-up on Specifiction yet; its figures are above.

tcpdump is a network monitoring and data acquisition tool that captures traffic through libpcap, an interface for user-level packet capture. It provides command-line tools and PCAP support, and the project lists systems including AIX, BSD variants, GNU/Linux, macOS, Solaris, QNX, and Windows. It is free, with source code available through a public Git repository and native packages or ports on many systems.

Building requires libpcap and a C99-compliant compiler. Windows builds also require WinPcap or Npcap and Visual Studio with CMake. The license permits redistribution and use in source and binary forms under its conditions. Capture permissions depend on the operating system and its configuration; the project cautions that permitted users may capture network traffic, including passwords. Native packages may lag a few versions, while a newer snapshot can be compiled from source. The project lists Linux, macOS, and Windows among its platforms.